<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <script src="https://cdn.bootcss.com/vue/2.6.10/vue.js"></script>
</head>
<body>
<div id="app">
  <p v-show="rich">
    今天就不出去玩了!!
  </p>
  <p v-show="flag">
    今天必须出去玩一会!!!
  </p>
</div>
</body>
<script type="text/javascript">
  Vue.config.productionTip =false;
  new Vue({
    el:"#app",
    data:{
      rich:false,
      flag:true
    }
  })
</script>
</html>